Vaporizer for internal-combustion engines.



PATENTED JUNE` 16, .1.903.

0.3. PERKINS. VAPOEIZEE EOE INTERNAL GOMBUSTION ENGINES."

APPLI'OATION FILED MAB.. 11, 1903.-

NO MODEL.

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UNITED STATES Patented June 16, 1903.

PATENT OFFICE.

VAPORIZER FOR INTERNAL -COlVlBUSTION ENGINES.

SPECIFICATION forming part of Letters Patent N o. 731,218, dated June 16, 1903.

Application tied Math 11, 190s.

To all whom, it may concern,.-

Be it known that I, OSCAR BERTROM PER- KINS, a citizen of the United States, and a resident of Gloucester, in the county of Essex and State of Massachusetts, have invented a new and Improved Vaporizer, of which the following is a full, clear, and exact description.

This invention relates to a vaporizer applicable to internal-combustion engines, and particularly those engines in which the Vsupply is choked to reduce the speed of the engine.

The prime object of the present-invention is to provide a vaporizer in which the ratio of the air and fuel in the explosive mixture will remain the same, notwithstanding thatl the volume of the mixture may be varied considerably, according to the adjustment of the vaporizer. This end I attain by certain special features of construction, the most prominent of which is the arrangement of two springs which by adjustment may be successively brought into action, so that when one spring is active the engine may be run at high speed and when both springs are active the 'supply of mixture will be choked or throttled, thus cutting down the speed.

This specification is an exact description of one example of myinvention, while the claims define the actual scope thereof.

Reference is to be had to the accompanying drawing, forming a part of this specification, in which the figure represents a vertical section taken through the vaporizer.

The shell a has an air-inlet ce', having a valve-seat co2 at its inner end. The shell also has a connection a3 with the inlet-port of the engine and an oil-supply al, communicating by a passage or passages a5 with the valveseat a2. The oil-supply ct"l should be,of course, fitted with a needle or other suitabie valve, so as to regulate the amount of gasolene discharged from the passage d5.

b indicates the valve, which works on the seat a2 and opens into the shell a. The stem b of the valve is fitted to slide freely in the hollow lower end of a screw c. This screw works in a head d, which is threaded or otherwise fastened in the top of the shell d to close the same, and e indicates a lock-nut working on the screw c above the head d, so

that the said screw may be held securely in the desired adjustment. On the screw c is formed a shoulder c, andagainst this shoulsprin g gbeing of less strength than the spring h and said spring g always engaging both the valve b and the plate f. By adjusting the screw c the tension of the spring g may be varied; but said spring is always active to some extent, atleast. The spring h, however, is shorter than the spring g and is supported on the valve b. It does not normally engage the plate f. When, however, the screw c, with its plate f, is moved downward sufficiently, this spring h will be engaged by the platef, and both springs will therefore become active.

In the'operation of the invention, after the gasolene-supp'ly is adjusted, to run it full speed the screw c should be moved upward, placing the spring g under minimum tension, and thus the valve willbe lifted at the very inception of the suction-stroke and the gasolene and air will be drawn into the cylinder throughout the whole of the stroke, thus attaining a maximum charge. This may be slightly decreased by increasing the tension of the spring g without, however, bringing the spring h into action; but to merely slow down or throttle the engine the screw c and plate f should be screwed down until the spring h is placed under tension. This increased pressure on the valve b will prevent the valve from lifting until a material part of the suction-stroke is traversed, and the result is that the cylinder will be charged only during part ofthe suction-stroke. The quality of the combustible mixture is, however, unchanged. It is by this means that I am able to vary the volume of the charge at will without in any way affecting its composition.

Various changes in the form, proportions, and minor details of myinvention may be resorted to at will without departingV from the spirit and scope thereof. Hence I consider myself entitled to all such variations as may lie within the intent of my claims.

Having thus described my invention, I

claim as new and desire to secure by Letters y Patentthe valve, and an adjustable screw for said member.

3. A vaporizer, comprising a shell having air and oil inlets, and a valve commanding the same, a stem attached to the valve, a hollow adjusting-screw in which the stem is loosely fitted, two springs adapted to engage the valve, and a member connected with the adjusting-screw and engageable with one or both of said springs to throw them into action.'

4. A vaporizer, comprising a shell having air and oil inlets and a valve commanding the same, a stem attached to the valve, a hollow adjusting-screw in which the stem is loosely fitted, two springs adapted to engage the valve, and a member connected with the adjusting-screw and engageable with one or both of said springs to throw them into aotion, said member comprising a plate engaged with a shoulder on the adj usting-screw and of area equal to the diameter of the largest spring.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

OSCAR BERTROM PERKINS.

Witnesses:

C. H. M. HAZEL, CATHERINE M. CHIsHoLM. 

